one source instead of two sources of power

[CMOSHC]

hi everybody



I have to realize a circuit to supply a coil with current up to 8 A , i have (in the picture ) two voltage sources , one from the left wich i can command , and the other on the right 12 V .

What i am wondering is , do i need a second source to produce 12 v , or there is a solution so i can have just one source , the commande to supply the coil .
thank you

 

[tpetar]

You can use the same source of power. In case that you want to use different power sources, ground should be common according to this circuit design.


Best regards,
Peter

 

[CMOSHC]

THANK YOU PETER for your answer

however , my prob is , how can i use the same source while the one in the left is commanded , changes between 0 and 5 V . what do you think ? and of course the ground should be comman .